Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Acer Aspire M3203. BIOS will randomly default HDD interface to RAID mode and fail to boot Windows 7, claiming there is no RAID array defined and, subsequently, "no boot device." If I go into BIOS and change it to IDE mode (options are IDE, RAID, and AHCI) it will boot just fine for a few times again.

Even when it does successfully boot in IDE mode, it still stops somewhere during POST to "scan for storage" and report "no defined array" until chugging along. The system has never had any RAID array set up. It's an OEM setup job, 2-3 years old.

The issue seems to have begun after an AC power failure that occurred during boot or right after it.

share|improve this question
add comment

1 Answer

The CMOS battery is probably dead. Replace it.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.